My arduino standalone board that i soldered with voltage regulator for staircase lights automation seems to be restarting/flickering whenever i switch on my tubelight which flickers almost every time due to start issue or whatever.

Is there anyway to immunize the arduino from power glitches like this? like bigger caps for voltage regulation,etc?

Someone suggested keeping a lower value resistor for reset instead of 10k, how lower that should go?

Running the arduino from the batteries will fix? or may introduce more problems than the fix?

Well without a complete wiring diagram including power source it's hard to give you specific advice, but yes proper filtering and bypass caps of appropriate size and applied correctly can generally deal with your problem, which sounds more like voltage sage due to load switching rather then just random circuit noise.

http://arduino.cc/en/Main/Standalone 2 10uF capacitors.Without the PUSH button to reset and the in-circuit programming chipswith exactly same parts and wirings.. I have soldered them all in the solder board. I will take a photo very soon

Power source is my grid and wallwart 12V , I have used voltage regulation in the circuit using the 7805 .

For example: If you are using a wire (you would actually be using at least two in this case) to communicate with another Arduino. And you would want to reduce the noise, consider connecting a part of the wire to the vcc through a pull-up resistor. Connect the end of the wire to the final destination.

My arduino standalone board that i soldered with voltage regulator for staircase lights automation seems to be restarting/flickering whenever i switch on my tubelight which flickers almost every time due to start issue or whatever.

Is there anyway to immunize the arduino from power glitches like this? like bigger caps for voltage regulation,etc?

Someone suggested keeping a lower value resistor for reset instead of 10k, how lower that should go?

Running the arduino from the batteries will fix? or may introduce more problems than the fix?

I think this thread has drifted off track rather - as I understand this there is a fluorescent light fitting that's creatingmains transients that are reseting the Arduino by some mechanism.

Likely things are:

1) inadequately protected power supply passing on the transient to the 5V rail2) interference being picked up by cables between the Arduino and the staircase lights.

But I've a few questions: What are these staircase lights? Are they distinct from the fluorescent lightthat is causing the problems? How are the staircase lights controlled by the Arduino? Are relevantlogic-level signal cables shielded and routed away from mains wiring?

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Staircases are CFL lights and yeah they are totally independent of the florescent

There are 6 of them and I have wired all of them to relay board which has 8 relays and an ULN2003.

I have ensured the digital wires and AC mains wire are separated out by few inches.

A few inches isn't great - route them completely away from each other. sheided cable is good,ferrite toroids can be good to reject common-mode transients. You may also have a ground loopwhich you need to think about - bring the mains to the relay board and Arduino PSU in one placeto avoid such a loop.

[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]